b Yzw
Figure 14 a ECL intensity versus potential for 4.1 x 10-4 M 250 ppm Al HQS 32 and 0.05 M TPrA in aqueous solution 0.2M KH2PO4 . b A Photolumiminescence of 0.4 mM solution of Al HQS 3 slit widths 3 nm in 0.2 M KH2PO4 and B electrochemi-luminescence of 0.4 mM solution of Al HQS 3 slit widths 10 nm in 0.2 M KH2P04 0.05M TPrA. ECL spectrum offset by 100 nm to the red for clarity. Conditions for ECL emission were optimized with the ECL correlating to aluminum concentration over several orders of...
Vi Water Testing
Electrogenerated chemiluminescence has also been applied to environmental analysis, including tests for parasites, bacteria, and toxic compounds in environmental water sources and drinking water Table 3 . The formats for these assays vary depending on the analyte however, all reported assays use Ru bpy 32 as the label and TPrA as the coreactant. Cryptosporidium parvum is a protozoan parasite ubiquitous in water that, if ingested in sufficient amounts, can cause gastrointestinal disease. The...
References
1. Cruser, S.A., Bard, A.J. Anal. Lett. 1967, 1, 11. 2. Faulkner, L.R., Bard, A.J. J. Am. Chem. Soc. 1968, 90, 6284. 3. Kuwana, T. In Electroanalytical Chemistry, Bard, A.J., Ed. New York Marcel Dekker, 1966 Vol. 1. p. 197. 4. Bard, A.J., Santhanam, K.S.V., Cruser, S.A., Faulkner, L.R. In Fluorescence, Guilbault, G.G. Ed. Marcel Dekker New York, 1967 p. 627 5. Cormier, M.J., Hercules, D.M., Lee, J. Eds., Chemiluminescence and Bioluminescence, Plenum Press New York, 1973. 6. Vojir, V. Coll....
Info Irj
Egashira, N. Kumasako, H. Ohga, K. Fabrication of a fiber-optic-based electrochemiluminescence sensor and its application to the determination of oxalate. Anal. Sci. 1990, 6, 903-904. Zhang, X. Bard, A.J. Electrogenerated chemiluminescent emission from an organized L-B monolayer of a tris 2,2'-bipyridine ruthenium 2 -based surfactant on semiconductor and metal electrodes. J. Phys. Chem. 1988, 92, 5566-5569. Obeng, Y.S. Bard, A.J. Electrogenerated chemiluminescence. 53. Electrochemistry and...
REFERENCES Eiz
1. Hercules, D.M. Chemiluminescence from electron-transfer reactions. Acc. Chem. Res. 1969, 2, 301-307. 2. Weller, A., Zachariasse, K. Chemiluminescence from radical ion recombination. VI. Reactions, yields, and energies. Chemiluminescence Biolumin., Pap. Int. Conf. 1973, Plenum, NY, NY 169-180. 3. Faulkner, L.R. Chemiluminescence from electron-transfer processes. Methods Enzymol. 1978, 57 Biolumin. Chemilumin. , 494-526. 4. Park, S.-M., Tryk, D.A. Excited state intermediates probed by...
R Tpy
Figure 30 a Proline. b Common amino acids other than proline. H3N CHRCOO OH - H2NCHRCOO h2o HNCHRCOO Ru bpy 33 - HN CHRCOO Ru bpy 32 H2N CHRCOO - H2NCRCOO H HNCRCOO Ru bpy 33 - HN CRCOO HN CRCOO H2O - RCOCOO NH3 1. Pyruvate and Other Organic Acids or Salts As in the case of oxalate described in Section II. A, the oxidation of pyruvate is suppressed by the presence of an oxide layer on the Pt electrode surface 2 . Because the oxidation potentials for pyruvate and Ru bpy 32 are almost identical...
References 1
1. Faulkner, L.R. Bard, A.J. Techniques of electrogenerated chemiluminescence. In Electroanalytical Chemistry, Bard, A.J., ed. Marcel Dekker New York, 1977 Vol. 10, pp 1-95. 2. Bocarsly, A.B. Tachikawa, H. Faulkner, L.R. Photonic electrochemistry. In Laboratory Techniques in Electroanalytical Chemistry, 2nd ed., Kissinger, P.T., Heineman, W.R., eds. Marcel Dekker New York, 1996 pp. 855-899. 3. Knight, A.W. Greenway, G.M. Occurrence, mechanisms and analytical applications of electrogenerated...
Info Gzn
wavelengths and accurately known, only slightly on temperature, and no significant dependence on light fluence reproducibility 2 precision 5 thermal aquation becomes a problem in basic solution. aFor general information on chemical actinometry, see, e.g., SL Murov, I Carmichael, GL Hug. Handbook of photochemistry, New York Marcel Dekker, 1993, Chap. 13 HJ Kuhn, SE Braslavsky, R Schmidt Chemical Actinometry. Pure amp Appl. Chem. 61 187-210, 1989. bSee, e.g., G Zimmerman, LY Chow, UJ Paik. The...
REFERENCES Asv
1. Knight, A.W. A review of recent trends in analytical applications of electrogenerated chemiluminescence. Trends Anal. Chem. 1999, 18, 47-62. 2. Fahnrich, K.A., Pravda, M., Guilbault, G.G. Recent applications of electrogenerated chemiluminescence in chemical analysis. Talanta. 2001, 54, 531-559. 3. Lee, W.Y. Tris 2,2'-bipyridyl ruthenium II electrogenerated chemiluminescence in analytical science. Mikrochim. Acta 1997, 127, 19-39. 4. Gerardi, R.D., Barnett, N.W., Lewis, S.W. Analytical...
REFERENCES Afl
1. Wheeler, B.L., Nagasubramanian, G., Bard, A.J., Schechtman, L.A., Dininny, D.R., Kenney, M.E. A silicon phthalocyanine and a silicon naphthalocyanine synthesis, electrochemistry, and electrogenerated chemiluminescence. J. Am. Chem. Soc. 1984, 106, 7404-7410. 2. Anderson, J.D., McDonald, E.M., Lee, P.A., Anderson, M.L., Ritchie, E.L., Hall, H.K., Hopkins, T., Mash, E.A., Wang, J., Padias, A., Thayumanavan, S., Barlow, S., Marder, S.R., Jabbour, G.E., Shaheen, S., Kippelen, B., Peyghambarian,...
Info Scv
Rubinstein, I. Bard, A.J. Electrogenerated chemiluminescence. 37. aqueous ECL systems based on Ru 2,2'-bipyridine 32 and oxalate or organic acids. J. Am. Chem. Soc. 1981, 103, 512-516. Bard, A.J. Fan, F.R.F. Electrochemical detection of single molecules. Acc. Chem. Res. 1996, 29, 572-578. Sheats, J.R. Antoniadis, H. M Hueschen, Leonard, W. Miller, J. Moon, R. Roitman, D. Stocking, A. Organic electroluminescent devices. Science 1996, 273, 884-888 and references cited therein, Armstrong, N.R.,...
Ii Instrumentation
In its most basic form, an ECL measurement consists of supplying electrical energy for the ECL reaction and measuring the generated luminescence with an optical detector Chapter 2 . The reaction takes place in a solution that contains the reagents required for ECL and an electrolyte for conducting current between the working and counter electrodes. The generated luminescence is proportional to the amount of ECL label present on, or very near, the working electrode surface. Three types of...
Viii Detection Of Biological Threat Agents
Assays based on ECL have been reported for the detection of numerous threat agents including toxins, bacteria, and viruses using both immunoassay and nucleic acid amplification formats Table 3 . Often, these assays provide a faster and more sensitive result than standard laboratory methods 128,129 such as culturing. The high sensitivity of ECL-based immunoassays for biowarfare agents has been well established. Early work noted femtogram detection limits for purified biotoxoids Staphylococcus...
Jv
200 300 400 500 600 700 800 Wavefength nm Figure 12 Left Current-voltage and light-voltage characteristics of a bilayer MEH-PPV PPV LEC under forward and reverse bias conditions. When forward-biased, the LEC emits red-orange light from the MEH-PPV layer. When reverse-biased, the LEC emits green light from the PPV layer. Right Electroluminescent spectra from the bilayer LEC under forward and reverse bias conditions. Inset shows a schematic diagram of the bilayer device structure. From Ref. 202....
Info Gil
Please see text for ligand definitions. Potentials are in volts vs. SSCE 0.2360 vs. NHE unless otherwise noted. Photoluminescence efficiencies relative to Ru bpy 32 em 0.082 unless otherwise noted. aECL generated via exciplex energy transfer between europium complex and ' A-D , where D tri-p-tolylamine radical cation and A benzophenone or dibenzoylmethane radical anion. bRef. 9. cWeak ECL such that no spectrum was obtained. dRef. 72. Please see text for ligand definitions. Potentials are in...
Iv First Row Transition Metals
Electrochemical, photophysical, and ECL data for the first row transition metals under both annihilation and coreactant conditions are presented in Table 4. The electrochemical reduction of Cr bpy 33 and Cr 4,4'-Me2bpy 33 4,4'-Me2bpy 4,4'-dimethyl-2,2'-bipyridine in aqueous solution containing persulfate S2O82- reductive-oxidative coreactant resulted in emission characteristic of the chromium metal-to-ligand charge transfer MLCT state 56 . The ECL emission intensity of Cr bpy 33 in water was...
Info Jdd
Table 8 Electrochemical, Spectroscopic, and ECL Properties of Rare Earth Metal Complexes. ECL Generated via Coreactants Table 8 Electrochemical, Spectroscopic, and ECL Properties of Rare Earth Metal Complexes. ECL Generated via Coreactants Ligand definitions DBM dibenzoylmethide TTA thenoyltrifluoroacetate BA benzoylacetate HFAC hexafluoroacetylacetate pipH piperidine cation BTA benzoyltrifluoroacetate 2.2.2 2.2.1 Potentials are in volts vs. Fc Fc 0.40 vs. NHE unless otherwise noted....